Stay Secure with the Latest Linux Advisories

security advisoryFedoradoS

Fedora: FEDORA-2019-139fcda84d High: Expat Namespace Extraction DoS

This update includes a fix for a security vulnerability, CVE-2018-20843: > Fix extraction of namespace prefixes from XML names; XML names with multiple colons could end up in the wrong namespace, and take a high amount of RAM and CPU resources while processing, opening the door to use for denial-of-service attacks For more information on the changes in 2.2.7, see the upstream release. --------------------------------------------------------------------------------Fedora Update Notification FEDORA-2019-139fcda84d 2019-07-16 03:21:48.723385 --------------------------------------------------------------------------------Name : expat Product : Fedora 29 Version : 2.2.7 Release : 1.fc29 URL : https://libexpat.github.io/ Summary : An XML parser library Description : This is expat, the C library for parsing XML, written by James Clark. Expat is a stream oriented XML parser. This means that you register handlers with the parser prior to starting the parse. These handlers are called when the parser discovers the associated structures in the document being parsed. A start tag is an example of the kind of structures for which you may register handlers. --------------------------------------------------------------------------------Update Information: This update includes a fix for a security vulnerability, CVE-2018-20843: > Fix extraction of namespace prefixes from XML names; XML names with multiple colons could end up in the wrong namespace, and take a high amount of RAM and CPU resources while processing, opening the door to use for denial-of-service attacks For more information on the changes in 2.2.7, see the upstream release notes at: https://github.com/libexpat/libexpat/blob/R_2_2_7/expat/Changes#L5 --------------------------------------------------------------------------------ChangeLog: * Thu Jun 27 2019 Joe Orton - 2.2.7-1 - update to 2.2.7 (#1723724, #1722224) * Thu Jan 31 2019 Fedora Release Engineering - 2.2.6-2 - Rebuilt forhttps://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild --------------------------------------------------------------------------------References: [ 1 ] Bug #1723724 - CVE-2018-20843 expat: large number of colons in input makes parser consume high amount of resources, leading to DoS [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=1723724 [ 2 ] Bug #1722224 - expat-2.2.7 is available https://bugzilla.redhat.com/show_bug.cgi?id=1722224 --------------------------------------------------------------------------------This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2019-139fcda84d' at the command line. For more information, refer to the dnf documentation available at https://dnf.readthedocs.io/en/latest/command_ref.html All packages are signed with the Fedora Project GPG key. More details on the GPG keys used by the Fedora Project can be found at --------------------------------------------------------------------------------_______________________________________________ package-announce mailing list -- This email address is being protected from spambots. You need JavaScript enabled to view it. To unsubscribe send an email to This email address is being protected from spambots. You need JavaScript enabled to view it. Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/This email address is being protected from spambots. You need JavaScript enabled to view it./ . A remedy for elevated RAM and CPU consumption flaws in the expat XML parser, reducing potential denial-of-service threats in Fedora 29.. expat XML parser, Fedora 29 security, DoS mitigation, namespace extraction issue. . LinuxSecurity.com Team

Jul 15, 2019 Fedora